Connecting; Connecting Into The Current Loop - Datcon DT9500 Operating Instructions Manual

DT9500

5. Connecting

5.1. Connecting into the current loop

In hazardous areas you should take note of the appropriate
regulations, conformity and type approval certificates of the
DT9500 and other instruments are connecting in the
current loop (e.g. power supply, transmitter, etc.).
The connection must be carried out by trained and
authorised personnel only!
Select connection cable A four-wire, twisted pair, shielded cable should be used for
connecting the measuring probe Pt100 to the apparatus. It
is also possible to use three-wire cables, but the
measurement accuracy will deteriorate due to the
asymmetry of the resistances of wires, and due to the
incertainty of contact resistances.
For connecting the loop-feeding, a two-wire, twisted pair,
shielded cable must be used.
For connecting the limit-value outputs, two-wire, twisted
pair cable with 500 V insulation may be used.
The internal cable diameter is 0,25–1,5 mm, the external
cable diameter is 5–10 mm.
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